Is hair thickening serum profitable to sell on Amazon United States?

The niche generates $185K/yr across 74 tracked products. 8 of 12 products launched in the last 360 days are still selling. 90-day search growth is +14.8%. Flapen's verdict: Worth a look (66/100).

How competitive is the hair thickening serum niche?

48 brands and 704 sellers compete. The top 5 products take 28% of clicks and top 5 brands hold 47% of demand.

What do buyers complain about in hair thickening serum?

Top complaints mined from reviews: Value For Money, Functionality-Overall, Hair Related. The return rate is 0.6%.

When does demand for hair thickening serum peak?

Demand peaks in Jul–Aug–Sep; the busiest month runs 6.6× the quietest.

What does it cost to enter the hair thickening serum niche?

Listings span $5.98–$86.59; the average listing price is $27.07 (sweet spot $15–$100). The average incumbent carries 7,251 reviews — the moat a new listing must climb.

hair thickening serum

Worth a look

Shows low returns (0.6%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Returns

Incredible0.6%

return rate — above 5% kills the launch gate

Avg price

Incredible$27.07

avg listing price — sweet spot $15–$100

Brand share

Great47%

top-5 brand share — no brand owns this niche

Competition

Great28%

top-5 click share — an open shelf

Price range

Great$5.98–$86.59

cheapest to priciest tracked listing — scored on the share inside $15–$100

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Growth

Okay+14.8%

90-day search growth — must beat 0% to launch

Conversion

Okay3.4%

search→purchase rate — share of searches ending in a sale

Market size

Okay$185K

$185K/yr · 202K searches

Review moat

Bad7,250.7

avg incumbent reviews — the moat a new listing must climb

Signals No Dominant Brand

According to Flapen's Amazon United States niche tracking, hair thickening serum is a $185K/yr Amazon United States market (202K searches/yr). The top 5 brands hold 47% of demand. Demand peaks in Jul–Aug–Sep. Verdict: Worth a look — 66/100.

Data updated Jul 14, 2026 · scored weekly · How we score niches

hair thickening serum market data

Units sold / yr: 8K–10K; avg 100–250/product
Revenue / yr: $217K–$271K; units × avg price
Conversion rate: 3.4%
Avg BSR: #623
Page quality: 0%
Prime: 89%
Sponsored: 81%
Out of stock: 0.6%
Avg brand age: 51 months
Avg seller age: 142 days

Competition & brand share

Clicks spread well past the top 5 (28% combined) — an open shelf where new products get seen.

Brands

48 rising

Sellers

704

Top-5 brand share

47%

Top 20: 82%

Top-5 click share

28%

Top 20: 62%

Open market

49%

Thicker Fuller Hair19%
Viviscal11%
The Ordinary7%
Botanic Hearth5%
Marc Anthony5%
BELLISSO4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +14.8% search growth over the last 90 days.

Peak months: Jul, Aug, Sep · busiest ÷ quietest = 6.6×

Open Trend

Top hair thickening serum search terms

hair thickening serum73K/yr +24.9%3.2% conv.
thicker fuller hair25K/yr +7.8%1.8% conv.
vitybell35K/yr +6.8%0.2% conv.
vitybell para el cabello capsulas15K/yr +31.4%0.2% conv.
thicker fuller hair serum17K/yr +33.5%5.1% conv.
dense hair vitamins14K/yr +1.7%0.6% conv.
thicker fuller hair thickening serum5K/yr +144.6%5.7% conv.
biotin zinc iron hair supplement7K/yr -22.7%1.0% conv.
viviscal hair thickening serum6K/yr -46.4%17.0% conv.
viviscal serum3K/yr -31.9%10.8% conv.

All search terms

Top hair thickening serum products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

The Ordinary Multi-Peptide Serum for Hair Density Peptide-Powered Formula for Thicker Fuller Looking Hair 2 Fl Oz

The Ordinary$22.564.1★1,488 rev

Viviscal Hair Thickening Serum Leave-in Elixir for Thicker Fuller Looking Hair Instant Lightweight Hair Product with Keratin & Biotin 1.69 fl oz

Viviscal$12.284.1★1,454 rev

Thicker Fuller Hair Serum Root Lifting Sulfate Free 4 Ounce (Pack of 2)

Thicker Fuller Hair$10.124.1★279 rev

Botanic Hearth$16.824.4★19,924 rev

Biotin Hair Thickening Serum for Men and Women - Intense Strengthening Treatment Product with Natural Botanical Oil Blend to Help Boost Thin Hair - Repair Thinning Hair Increase Volume and Shine

BELLISSO$13.054.4★6,072 rev

Newest

by launch date

Thick-Full Hair Thickening Serum 5 fl oz - Pack of 2 - with Mongongo Oil Green Coffee Oil & Aloe Leaf Juice

Generic$20.562 rev

4mo ago

Kerastase Genesis Hair Serum - Daily Strengthening Treatment for Weak Hair Silicone-Free Anti-Breakage Nourishes and Reinforces Hair Serum Fortifiant 1 Fl Oz

KÉRASTASE$32.892,345 rev

4mo ago

Bare Anatomy Advanced Hair Density Serum | 3% Redensyl 4% Anagain 3% Baicapil 1% Capilia Longa Rosemary Biotin & Rice Extract | Reduces Hair Fall Supports Hair Growth for Men & Women | 30 ml

Bare Anatomy$14.79225 rev

5mo ago

Hair Thickening Serum Helps Reduce Hair Loss Korean Hair Growth Serum Roll On for Men and Women Scalp Care Balances Oil Rosemary 0.5 Fl Oz (Pack of 1)

Sahha$19.2377 rev

6mo ago

Hair Growth Serum for Thinning Hair | Thicker Fuller Hair Thickening Serum | Rosemary Oil Saw Palmetto Biotin | Multi Peptides Redensyl Topical Caffeine Scalp Serum for Women | Density DHT Blocker

THORN & BERRY$14.0665 rev

10mo ago

What buyers say about hair thickening serum

What buyers praise and complain about, mined from review topics.

What buyers love

Hair Growth20%

“Crazy hair growth”

Quality-Overall12%

“is a quality hair product”

Smell10%

“The scent is fresh”

Taste-Overall6%

“no nasty taste”

Vitamin4%

“Yummy vitamin”

Value For Money4%

“Excellent value”

Soft Feel3%

“Hair so soft”

Suitability Straight Hair3%

“Easy and fast to straighten hair”

Ease Of Use2%

“Easy to take”

Moist/Dry2%

“less dry”

What buyers complain about

Value For Money9%

“Quite expensive”

Functionality-Overall8%

“No Results”

Hair Related7%

“Did not work on my hair”

Smell6%

“Funky Smell”

Allergies5%

“Itchy rash”

Taste-Overall5%

“Horrible after taste”

Side Effects5%

“Made me sick”

Oily/Greasy3%

“Leaves my hair oily”

Thickness2%

“Way too thick”

Moist/Dry2%

“No moisture”

Top return reasons

Functionality-Overall12%

Smell12%

Oily/Greasy9%

Advertised Vs Actual Product9%

Value For Money8%

Leak-Proof6%

Damage/Burn Hair6%

Size-Overall5%

Product Condition4%

Suitability Short Hair3%

Common questions

Is hair thickening serum profitable to sell on Amazon United States?: The niche generates $185K/yr across 74 tracked products. 8 of 12 products launched in the last 360 days are still selling. 90-day search growth is +14.8%. Flapen's verdict: Worth a look (66/100).
How competitive is the hair thickening serum niche?: 48 brands and 704 sellers compete. The top 5 products take 28% of clicks and top 5 brands hold 47% of demand.
What do buyers complain about in hair thickening serum?: Top complaints mined from reviews: Value For Money, Functionality-Overall, Hair Related. The return rate is 0.6%.
When does demand for hair thickening serum peak?: Demand peaks in Jul–Aug–Sep; the busiest month runs 6.6× the quietest.
What does it cost to enter the hair thickening serum niche?: Listings span $5.98–$86.59; the average listing price is $27.07 (sweet spot $15–$100). The average incumbent carries 7,251 reviews — the moat a new listing must climb.